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习题练习：Impulse and momentum
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 作者: admin  发布日期: 2024-08-07 16:03    总分: 17分  得分: _____________

答题人: 游客未登录  开始时间: 24年08月07日 15:54  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  94.16: A car of mass m, traveling at speed v, stops in time t when maximum b4e8bo 2kghubp-n8ge j5iaje t4g )u*9raking force is applied. Assuming the braking force is independent of mass, what time would be required to stop a car of mass h8-e uu94 aoeb2j4pkb gijneg5*g) 8t2m traveling at speed v?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.04: When the velocity of a moving object is dok nskf c57u19oubled, its_______is also doubled.f ks71nuk9c o5

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  96.06: Impulse, Fne7uc *u:n7f b(kvn* rpkl;n6owt $\Delta$tis best related to:

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.05: Which one of the following choices is most close0(sc u 6u-rprfq/ 8xtbly associated with the following observation about an isolated object: “The lineaq rprf tu6uxc8 b0-/(sr momentum of the object is constant.”?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.21: The change inv ge5v0l -ez/xcly3,k linear momentum of an object is always in the same direction ascvele,kgxzl/y5v - 03 the

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.08: How long must a 100 N net f:s (m .pgt,ythorce act to produce a change in momentum of 200 k tsth, .gpm:y(g.m/s?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.29: P and Q have the same momentum. Q udth6d 4u- yr0r.ibv3xvr 1sc,f2 pb5can have more kinetic energy than P if itcrdd,urxfh-vi2 t r35b4y1 . b6puvs0:

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  98.26: A ball with a mass of 0.50 kg aqdl)b2;4n jl hnd a speed of 6.0 m/s collides perpendicularly with a wall and boun2jn4llh;b dq )ces off with a speed of 4.0 m/s in the opposite direction. What is the magnitude of the impulse acting on the ball?

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.08: A 50 kilogram gymnast falls freely from a heig-ak r-b2wq i6a*mgpr+v jm :7kht of 4 meters on to a trampoline. The trampoline then bounces her back upward with a speed equal to the speed at which she first struck the trampoline. What is the average force the trampoline applies on the gyv-- b r2am kpg:w+ka7q6i rjm*mnast?

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.27: A 2.0 kg mass moves at 10.0 m/sadpc 9)io27 c nx*y3zs when it has a collision in space. The mass’s speed was unchanged, but the direci9s cy*2 op7 )xz3adcntion of its velocity was altered by $80^{\circ}$. If the collision lasted 0.25 s, what was the magnitude of the average force exerted on the mass?



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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.13: A bat striking a 0.125 kg-baseball is in contact wip pa4c/h6x-y-cer8ss th the ball for a time of 0.03 seconds. The ball travels in a straight line as it approaches and then leaves the bat. Iy- /sx8pa6 cs chp-re4f the ball arrives at the bat with a velocity of 4.5 m/s and leaves with a velocity of-6.5 m/s, what is the magnitude of the average force acting on the ball?

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.43: An object of mass 4.0 g has atotal kinetic energy of 100.0 J antud0jbglt9 :01d tfz + mq-0ggd an x-component of linear momentum equal to 24.0 kg.m/s. The object is moving in the xl: tgzd gj1+09u 0-fm tt0dgqb-y plane. What is they-component of the object’s linear momentum?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.05: At an instant of time t, a point object of mass M moves w,6nndx:iowf +y: .y0s p ye8mdd g/1qbith velocity V, has acceleration a, and is at position (x,y). In what direction must th+ 6q8dg /d:.:ompy0ynyidn w1x, ef sbe linear momentum of the object be directed at this instant?

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.32: A rubber ball of mb dn5e(axkua8/g3t.t/s9qr xass 2.0 kg falling straight downward hits the ground with a speed of 0.90 m/s and th/kgb5q.dtn8t u s/ x rx3e9aa(en rebounds straight upward with a speed of 0.60 m/s. The collision time of the ball with the ground is 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average acceleration (in units of $m/s^{2}$ ) of the ball while it is in contact with the ground?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.33: A rubber ball of mass 2.0 kg falling straight downward hits th): ,8e;yaxtol1v ggtu e ground with tgo)vu:y e18;g,lxat a speed of 0.90 m/s and then rebounds straight upward with a speed of 0.60 m/s. The collision time of the ball with the ground is 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average force (in units of Newtons) exerted by the ground on the ball while they are in contact?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  14.12: A box of mass 5.0 kg is being pushed to the right across a horizont rcofsw.n/+; *n6vluyal surface while a constant frictional force of 8.0 N acts on the box. At some instant of time, the u/l wfvn;c+6y * r.nosbox has a speed of 4.0 m/s and an acceleration of$3.0\; m/s^{2}$ . What is the magnitude of the net force acting on the box at this instant?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.12: A box of mass 12.0 kg is being pushed to the right across axjonh)p; 3 9ll i2ylag5-p3bq horizontal surface. When the box has 12.0 J of kinetic energy, a 12.0 N net foqgpxp23lil; )ab3y5 ohnlj9- rce acts on it. Which one of the following choices best represents the magnitude of the linear momentum of the box at this instant?

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  • 姓名:游客(未登录)
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    总分:17分 及格:10.2分 时间:不限时
    未答题: 已答题:0 答错题:
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